<template>
  <div class="app-container">

    <el-form label-width="120px">
      <el-form-item label="讲师名称">
        <el-input v-model="teacher.name"></el-input>
      </el-form-item>

      <el-form-item label="讲师排序">
        <el-input-number v-model="teacher.sort" controls-position="right" min="0" />
      </el-form-item>

      <el-form-item label="讲师头衔">
        <el-select v-model="teacher.level" clearable placeholder="请选择">
          <el-option :value="1" label="高级讲师" />
          <el-option :value="2" label="首席讲师" />
        </el-select>
      </el-form-item>

      <el-form-item label="讲师资历">
        <el-input v-model="teacher.career" />
      </el-form-item>

      <el-form-item label="讲师简介">
        <el-input v-model="teacher.intro" :rows="10" type="textarea" />
      </el-form-item>

      <el-form-item label="讲师头像">

      <!-- 头像缩略图 -->
          <pan-thumb :image="teacher.avatar" />
          <!-- 文件上传按钮 -->
          <el-button type="primary" icon="el-icon-upload" @click="imagecropperShow=true">
          更换头像
          </el-button>
          <!--
          v-show:是否显示上传组件
          :key 类似于id，如果一个页面多个图片上传控件，可以作区分
          :url  后天上传的url地址
          @close  关闭上传组件
          @crop-upload-success  上传成功后的回调
           -->
          <image-cropper
          v-show="imagecropperShow"
          :width="300"
          :height="300"
          :key="imagecropperKey"
          :url="BASE_API+'/ossService/upload'"
          field="file"
          @click="close"
          @crop-upload-success="cropSuccess"
          />

      </el-form-item>
        <el-form-item>
          <el-button :disabled="saveBtnDisabled" type="success" 
          @click="saveOrUpdate" round>保存</el-button>
        </el-form-item>
        
    </el-form>
  </div>
</template>

<script>
import teacher from "@/api/teacher/teacher";
import imageCropper from '@/components/ImageCropper';
import panThumb from '@/components/PanThumb';
export default {
  components:{imageCropper,panThumb},
  data() {
    return {
      teacher: {
        name: "",
        sort: 0,
        level: 1,
        career: "",
        intro: "",
        avatar: "",
      },
      saveBtnDisabled: false, //保存按钮是否禁用
      imagecropperShow:false,//上传弹框组件是否显示
      imagecropperKey:0,//上传组件key值
      BASE_API:process.env.BASE_API //获取dev.env.js里的地址
    }
  },

  created() {
    this.init()
  },
  watch: {
    //监听
    $route(to, from) {
      //路由一旦变化，则执行该方法
      this, init();
    },
  },
  methods: {
    close(){
      //关闭上传弹窗的方法 
      this.imagecropperShow=false
      //上传组件初始化
      this.imagecropperKey = this.imagecropperKey+1
    },
    cropSuccess(data){
      // console.log(data)
      this.imagecropperShow=false
      //上传成功的方法
      this.teacher.avatar = data.url
      this.imagecropperKey = this.imagecropperKey+1
    },
    init() {
      //判断路径是否有ID值
      if (this.$route.params && this.$route.params.id) {
        //从路径获取ID值
        const id = this.$route.params.id
        this.getInfo(id)
      } else {
        //路径没有ID值，做添加
        //清空表单
        this.teacher = {}
      }
    },
    //根据工程师ID查询
    getInfo(id) {
      teacher.getTeacherInfo(id)
      .then( (res) => {
        this.teacher = res.data.teacher;
      });
    },
    saveOrUpdate() {
      this.saveBtnDisabled = true
      //判断是修改还是添加
      if (!this.teacher.id) {
        this.addTeacher();
      } else{
        this.updateTeacherInfo();
      }
    },
    //修改工程师
    updateTeacherInfo() {
      teacher.updateTeacher(this.teacher)
      .then( (res) => {
        //提示信息
        this.$message({
          type: "success",
          message: "修改成功!",
        });
        //回到列表页面 路由跳转
        this.$router.push({ path: "/teacher/table" });
      });
    },
    //添加讲师
    addTeacher() {
      teacher.addTeacher(this.teacher).then((res) => {
        //添加成功
        //提示信息
        this.$message({
          type: "success",
          message: "添加成功!",
        });
        //回到列表页面 路由跳转
        this.$router.push({ path: "/teacher/table" });
      });
    },
  },
};
</script>